It is known that the wording of a question can affect the answer given. Imagine that a large population of American adults had seen a video of a traffic accident in which a car ran a stop sign and struck another car. After viewing the video, the participants were asked to judge how fast the car (that ran the stop sign) was going when it contacted the other car. On average they judged that it was going ₀ = 30 mph. This distribution is normal with a standard deviation = 12. In a subsequent study a random sample of 64 American adults was shown the same video and asked how fast the car was going when it smashed into the other car. The researcher predicted that _Smashed > _Contacted, and found that z_obs = 1.92.

1

Compute the p-value associated with z_obs. (Please enter your answer correctly rounded to at least 2 decimal places.)

2,Compute the estimated effect size (i.e., estimated ). (Please enter your answer correctly rounded to at least 2 decimal places.)

3.What sample mean produced z_obs = 1.92? Hint: remember, z_obs = (m - ₀)/_m . (Please enter your answer correctly rounded to at least 2 decimal places.)